Is Ginkgo biloba extract Safe with Warfarin?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Avoid taking Ginkgo biloba supplements while on warfarin. If currently using both, inform your doctor immediately and have your INR checked. Do not start Ginkgo biloba without prior consultation with your healthcare provider if you are on warfarin.
Why this interaction occurs
Pharmacist case reports identified adverse events in patients taking Ginkgo biloba extract concurrently with warfarin. Ginkgo biloba has known antiplatelet properties that can compound warfarin's anticoagulant effect, increasing hemorrhagic risk.
Evidence
Evidence level: limited.
Data source
PubMed - PMID 32378676
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 134,328 reports mentioning Warfarin. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Warfarin + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Ginkgo biloba extract interactions → · All Warfarin interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.